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A first approach to model the low-frequency wave activity in the plasmasphere
oleh: R. André, R. André, R. André, F. Lefeuvre, F. Simonet, U. S. Inan
| Format: | Article |
|---|---|
| Diterbitkan: | Copernicus Publications 2002-07-01 |
Deskripsi
A comprehensive empirical model of waves is developed in the objective to simulate wave-particle interactions involved in the loss and acceleration of radiation belt electrons. Three years of measured magnetic wave field components from the Plasma Wave Instrument on board the DE-1 satellite are used to model the amplitude spectral density of the magnetic wave field of each type of emission observed in the equatorial regions of the plasmasphere: VLF transmitter emissions, chorus emissions, plasmaspheric hiss emissions and equatorial emissions below ~ 200 Hz. Each model is a function of the wave frequency <i>f </i>, the MLT, <i>L</i> and Mlat parameters, and the <i>Kp </i>values. The performances of the plasmaspheric hiss and chorus models are tested on amplitude spectra recorded on board the OGO-5 and GEOS-1 satellites.<br><br><b>Key words. </b>Magnetospheric physics (plasmasphere; plasma waves and instabilities; instruments and techniques)